JPS5621210A - Power failure backup unit - Google Patents

Power failure backup unit

Info

Publication number
JPS5621210A
JPS5621210A JP9595579A JP9595579A JPS5621210A JP S5621210 A JPS5621210 A JP S5621210A JP 9595579 A JP9595579 A JP 9595579A JP 9595579 A JP9595579 A JP 9595579A JP S5621210 A JPS5621210 A JP S5621210A
Authority
JP
Japan
Prior art keywords
power
output
power supply
routine
power failure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9595579A
Other languages
Japanese (ja)
Inventor
Kazuhiro Takazawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP9595579A priority Critical patent/JPS5621210A/en
Publication of JPS5621210A publication Critical patent/JPS5621210A/en
Pending legal-status Critical Current

Links

Landscapes

  • Power Sources (AREA)
  • Stand-By Power Supply Arrangements (AREA)
  • Safety Devices In Control Systems (AREA)

Abstract

PURPOSE: To back up the power supply with low power consumption without losing substantial functial fuction of unit, by performing the backup of power supply through the detection of power failure of AC power input and cutting off all the output port signals having much power consumption at the same time.
CONSTITUTION: If the AC power input 2 is in failure, the power supply backup circuit 8 draws power supply from the battery 7, and supplies power to the microcomputer control section 12 through the constant voltage circuit 10. Simultaneously, at the control section 12, the power failure deciding routine C decides the adsence of AC waveform at the input port 22 checked at the check routine B and detects the power failure, and in this case, the output to the 1st output port 26 to the digital display section 16 comparatively much in the power consumption in the output limit routine is inhibited and the output limit routine f inhibits the output to the 3rd output port 30 to the control output section 20.
COPYRIGHT: (C)1981,JPO&Japio
JP9595579A 1979-07-27 1979-07-27 Power failure backup unit Pending JPS5621210A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9595579A JPS5621210A (en) 1979-07-27 1979-07-27 Power failure backup unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9595579A JPS5621210A (en) 1979-07-27 1979-07-27 Power failure backup unit

Publications (1)

Publication Number Publication Date
JPS5621210A true JPS5621210A (en) 1981-02-27

Family

ID=14151660

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9595579A Pending JPS5621210A (en) 1979-07-27 1979-07-27 Power failure backup unit

Country Status (1)

Country Link
JP (1) JPS5621210A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5822407A (en) * 1981-08-04 1983-02-09 Toshiba Corp Microcomputer for automobile
JPS61294529A (en) * 1985-06-21 1986-12-25 Nippon Carbureter Co Ltd Electronic controller
JPS63266511A (en) * 1987-04-24 1988-11-02 Hitachi Ltd Power source control system
JPH0426336A (en) * 1990-05-17 1992-01-29 Fujitsu Ltd Backup control circuit
EP0562538A2 (en) * 1992-03-26 1993-09-29 Matsushita Electric Industrial Co., Ltd. Gas burning apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5822407A (en) * 1981-08-04 1983-02-09 Toshiba Corp Microcomputer for automobile
JPS61294529A (en) * 1985-06-21 1986-12-25 Nippon Carbureter Co Ltd Electronic controller
JPS63266511A (en) * 1987-04-24 1988-11-02 Hitachi Ltd Power source control system
JPH0426336A (en) * 1990-05-17 1992-01-29 Fujitsu Ltd Backup control circuit
EP0562538A2 (en) * 1992-03-26 1993-09-29 Matsushita Electric Industrial Co., Ltd. Gas burning apparatus
US5429111A (en) * 1992-03-26 1995-07-04 Matsushita Electric Industrial Co., Ltd. Gas burning apparatus

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